Water treatment apparatus



FIG. 1 is a front elevation view of a water treatment apparatus, showing our new design;

FIG. 2 is a side elevation view thereof taken from the left of FIG. 1;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a rear elevation view thereof. 

CLAIM We claim, the ornamental design for a water treatment apparatus, as shown and described. 